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-
-\everymath={}%
-
-\section ExPex and PSTricks
-
-\begininventory
-\macros* \idx{|\Lingset|}\endmc
-\endinventory
-Several features of \ExPex\relax, listed in (\nextx), come into
-play only if {\sl pstricks.tex\/} has been loaded at the point
-that {\sl expex.tex\/} is loaded. They are intended to make it
-easier to use {\sl PSTricks\/} in examples.
-
-\pex[labeltype=numeric]
-\a |\Lingset| is activated. It works like |\lingset|, but if
-there are parameters which are not in the family {\sl ling}, they are
-passed to |\psset|.
-\a The family {\sl ling\/} is added to the set of parameter families
-which |\psset| can set.
-\a The optional argument of |\ex|, |\pex|, and |\exdisplay| is
-passed to |\Lingset|.
-\xe
-
-\noindent |\Lingset| first scans its argument from left to right
-and sets all the parameters from the family {\sl ling}. The
-remaining keys are then passed to |\psset|. If {\sl PSTricks\/}
-has not been loaded, |\Lingset| is defined, but its meaning is
-the meaning of |\lingset|.
-
-This is illustrated by (\nextx).
-
-\medskip
-\framedisplay%[exclude]
-\ex[angle=-90,nodesep=0pt,arrows=->,labelsep=.25ex,linearc=.7ex,
- dima=.2em]
-\def\\#1(#2){\rnode{#2}{\strut #1}}%
-%
-\vrule height0pt depth5.3ex width0pt
-\\Whom(A) did John persuade \\t(B) [ PRO to visit \\whom(C) ]
-\ncbar[armA=3.5ex,offsetB=\lingdima]{B}{A}
-\bput{0}{$M_{sp}=2$}
-\ncbar[armA=4.5ex,offsetB=-\lingdima]{C}{A}
-\bput{0}(1.2){$M_{sp}=6$}
-\xe
-\endframedisplay
-
-\noindent (The example is from Juan Uriagereka, in {\sl The Role
-of Economy Principles in Linguistic Theory}.)
-
-In the code below, note that the optional argument of |\ex| is
-used to set the \PSTricks\ parameters |angle|, |arrows|,
-|nodesep|, |labelsep|, and |linearc|, and the \ExPex\ parameter
-|dima|. Note also that the \ExPex\ scratch dimension
-|\lingdima| is used seamlessly by the {\sl PST-Node\/} macros.
-
-\CLnum
-\ex[angle=-90,nodesep=0pt,arrows=->,dima=.2em, labelsep=.25ex,
- linearc=.7ex]
-\def\\#1(#2){\rnode{#2}{\strut #1}}%
-%
-\vrule height0pt depth5.3ex width0pt
-\\Whom(A) did John persuade \\t(B) [ PRO to visit \\whom(C) ]
-\ncbar[armA=3.5ex,offsetB=\lingdima]{B}{A}
-\bput{0}{$M_{sp}=2$}
-\ncbar[armA=4.5ex,offsetB=-\lingdima]{C}{A}
-\bput{0}(1.2){$M_{sp}=6$}
-\xe |endCLnum
-
-\noindent Since the connections which \PSTricks\ draws are
-dimensionless, a zero width |\vrule| is used to give correct
-spacing. (The width can first be made nonzero so it is visible,
-and the depth adjusted.)
-
-The following gives the same result.\exbreak
-
-\CLnum
-\ex
-\psset{angle=-90,nodesep=0pt,arrows=->,dima=.2em,labelsep=.25ex,
- linearc=.7ex}|endCLnum
-\removelastskip
-\hskip.7in $\vdots$
-\vskip1em
-
-|\Lingset| and |\psset| are not entirely equivalent, even when
-\PSTricks\ is active. If a key name in the family {\sl ling\/}
-is the same as a key name in another family which has also been
-added as part of the \PSTricks\ extended family, |\Lingset| will
-treat it unambiguously as in the {\sl ling\/} family. |\psset|,
-on the other hand, does not give priority to keys in the {\sl
-ling\/} family. Exactly how |\psset| establishes priority is a
-complex matter, depending on the history of the formation of the
-\PSTricks\ extended family.
-
-